Neoway N723-EA - I2 S

N723-EA Hardware User Guide
Chapter 5 Application Interfaces
Copyright © Neoway Technology Co., Ltd. All rights reserved.
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Schematic Design Guidelines:
⚫
The SDC_PWR_EN and SDC_DET pins only support 1.8 V level.
⚫
It is recommended to reserve the positions for pull-up resistors on the SD/eMMC lins.
⚫
When using a SD card not supporting 1.8 V level, change the pull-up power supply of the
SD/eMMC signal to the corresponding power supply domain.
⚫
Control the equal length for the SDC/MMC interface. For the specific equal length requirements,
see the requirements of the corresponding WLAN chip or module.
5.3.5 I2S
The I2S_MCLK pin has internal pull-up or pull down; do not add a pull-up or pull-down resistor outside the
module when this pin is in use.
Signal
Pin
I/O
Function description
Remarks
I2S_SCLK
9
DO
I2S data clock
Leave this pin floating if it is not used.
I2S_TX
10
DO
I2S data sending
Leave this pin floating if it is not used.
I2S_RX
11
DI
I2S data receiving
Leave this pin floating if it is not used.
I2S_WS
12
B
I2S right and right
channels selection
Leave this pin floating if it is not used.
I2S_MCLK
64
DO
I2S master clock
26 MHz by default